<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title>js测试</title>
    <link rel="stylesheet" href="bootstrap.min.css"/>
</head>
<body>
<div class="dropdown">
    <button class="btn btn-default dropdown-toggle" type="button" data-toggle="dropdown">
        下拉菜单
        <span class="caret"></span>
    </button>
    <ul class="dropdown-menu" role="menu">
        <li role="presentation"><a href="#" role="menuitem" tabindex="-1">hello</a></li>
        <li role="presentation"><a href="#" role="menuitem" tabindex="-1">hello</a></li>
        <li role="presentation"><a href="#" role="menuitem" tabindex="-1">hello</a></li>
        <li role="presentation"><a href="#" role="menuitem" tabindex="-1">hello</a></li>
        <li role="presentation"><a href="#" role="menuitem" tabindex="-1">hello</a></li>
    </ul>
</div>
<script src="jquery-1.11.1.js"></script>
<script src="bootstrap.min.js"></script>
<script>
    $(function(){
        $(".js-popover").
    })
</script>
<!--对不支持浏览器的补救措施-->
<noscript>当前浏览器不支持script</noscript>
</body>
</html>